GLB Pool & Spa Products 71010 1-Quart Filter Fresh Pool Filter Cleaner Removes debris from cartridge filters helps filter operate at maximum efficiency concentrated formula The ideal way to maximize your filter's efficiency; remove debris simply by soaking filter in solution overnight and rinsing the next morning Refer to filter manufacturer's recommendations regarding maintaining your pool filter at peak efficiency; refer actual label for product precautions Compatible with chlorine, bromine, ozone and biguanide sanitizers; this item is not for sale in Catalina island Measures 9.9-inches in length by 3.2-inches in width by 3.2-inches in height